Automatic stop device



June 10, 1930. F OBERST AUTOMATIC STOP DEVICE Filed June 14, 1929 2 Sheets-Sheet 1 I AT ORNEYS June 10, 1930. F. QBERST' 1,762,638-

AUTOM ATIC STOP DEVICE Filed June 14, 1929 2 Sheets-Sheet 2 TTORNEY S Patented June 10, 1930 PATENT OFFICE IRANK onizfiis'r, oi" iosjiiiiitnniin iifritfjoRi Ass'i'e noit To w'InBUR rRon'uo-rs delvi- PANY, A= CORPORATION OF NEW YORK Application filed June 14,

. automatic non-set stop which is simple in 7 construction and operation and which will be efiicient and durable and well" designed to meet the demands'of economic manufacture, and which is adapted for use with any type of sound record.-

Numerous other objects of the present invention include the novel combination and v to move by gravity to inoperative position.

ent invention is to provide a stop device which includes means for retaining the mom bers in operativerelation whereby handling of the phonograph will not'permit theparts The means of the present'invention for ac- I complishingthis object includes a spring urged latch member movable only by associated-parts to release the device for stopping movement. I 7

These and other objectsof the presentin"- vention'wiirbe app arent from a consideration ofthe following specification and accom- 1 panying drawings in which Fig. 1- is a top plan view of one form of my present invention applied to a-portable type phonograph and with a portion of the turntable broken away; i

Fig. 2 is a View of theturntable' and' stop rhec'ha'ni'sm just prior to the stopping attioa; V f I i Fig. 3 is a similar view of the stop in operative position;- and" Fig p i is a perspective view of the stop mechanism;

Referring more particularly to Fig. 1 of the drawings, the embodiment of the'inven-' tio'n' herein disclosed-i s for convenience illustrated'i-n conjunction with a portable 1929. Serial No. 370,798.

type phonographthe tone arm 10 and turntable II of which are the only features which coaot with the stop in the operation of the invention. It is therefore not deemed req uisite that a detail desc'riptioi' of conven tional associate structure be made. It will be un-derstood that the invention is applicable to many various forms ofphonographs and that the invention is not limited to the type; here illustrated.

The stop mechanism includes two inclependently mounted associated cooperating" parts,--an arm 12 mounted atthe base of the tone 10 for movement therewith and 2.; depending projection 13 extending from the lower face of the turntable l1 approximately halfway between the center and peripheral edge thereof. The function and operation of the arm- 12 and projection 13 will he" hereinafter described. It will beunderstoodthat their configuration as well as the configuration and design of associated. partsrmay undergo various changes without departing from the spirit or scope of the appended claims; r p

Referring to the main portion of the stop mechanism illustrated in perspective in Fig. 4;- the same includes a base 1 f securable' to the motor board of a phonograph by threaded securing members 15' as shown in Fig. 1. The body 14 is preferably of flat sheet metal and is of tapering. shape to provide a tapering end 16 upon which is mounted a headed guide pin 1-7 .7 Theopposite end of the body is wider and includes upwardly bent stop detents 1-8 and 19 oppositely disposed and rising from the sides of the body. The end of the body, is provided with a spring securing projecting support 20 adjacent to which a brake pivot .2l is provided. Intermediate the ends ofthe body a pivot 22 is provided for the actuating arm 23.

The actuating arm 23 is" centrally pivoted upon the pivot 22. and includesan inwardly extending 24 terminating in a triangular projection engaging head 25' and a brakeeng'a'gingarih 26 terminating in an angularlydi'sposed' brake contacting surface 27. acent the pivoted portion of the arm 23 there is provided a controller carrying arm the'body 14 and the arm 28 for respective movement to each, by the provisions ofwthe headed members 17 and 29 extending through the respective elongated apertures 31 and 32 thereof. Adjacent the aperture 31 a pair of extending fingers 33 are'provided'i which cooperate with the arm 12 for con-,

trolling the mechanism as will be herein describe. I Q

For preventing accidental outwardmovement of the controller 30to inoperative position whereby the arm 12 would abut the inner face of the inner finger 33, the con troller. is provided with a pivoted latch 41, the outer end of which is turned to provide the vertical surface 42, while the inner'end of the latch 41 extends downwardly to provide the latching detent 43.- The assembly further includes a latch spring 44 which normally urges the detent 43 towards a receiving notch 45 cut in the side of the member 14.

'It will readily be seen that the latch' assembly is such that when the controller is" in the normal at rest position shown in: Fig.

1 that the detent 43 is received in the notch 45"thus'holding the controller in operative position. .When the arm 12 moves to the position shown in Figs. 2 and 3 it will be seen'that the extremity of the arm will strike the vertical'surface 42 of the latch41 and will move the latch about its pivot and against thetension of its spring 44 thus releasing the detent 43 from the notch 45 and permitting movement ofv the controller with respect to the body 14. 1

-. The mechanism is completed by the provision of a pivoted-frictional-brake35 which is pivoted to the body 14 by the pivot 21 and which includes a 'disc engaging flange 36 upon which is secured suitable friction ma: terial 37 and an oppositely disposed handle 38 together with an actuator flange 39 to which a spring40 is secured and extends to the securing flange 20. In the operation of the device the normal at rest position of'the tone arm, turntable and stop mechanism is shown in Fig, 1. In this position the arm 12 is out of engagement with the fingers 33 ofthe controller 30. The controller is in inward position .with

respectto the body 14 and the arm 23; The

arm 23 is in clockwise rotated positioni the stop 18 being against the arm" 26 andthe brake is in braking position with the flange 36 pressing the material 37 against theinner face of the turntable flange. The position of the brake is maintained by the spring40' which exerts its tension between the body 14 and brake 35 in a line outsideof the pivot 21'.

When it is desired toplay the instrument, the tone arm is arranged in the usual manner and the brake 35 is rocked about its pivot 21 to disengage the same. This disengaged position of the brake 35 is maintained during the playing period by the change of line of tension by thespring 40inside the pivot 21 as. shown in Fig. 2.

During the intermediate playing operation, the contrcller'3O is inthe position shown in Fig. '1' and so remains till the tone arm approaches the center ofth'e record. In this position'of the controller the arm 23 is in its clockwise pivoted position, the head 25 being 'so disposed that the projection 13 passes on the inner face of the head and the stop mechanism retains its inoperative position;

As the tone arm approaches the end of the playing groove, the arm 12 is moved therewith to be received between the fingers 33,

thus moving the latch and releasing the engagement of the controller 'withthe body-14; N o movement of the controller, however, takes place until-the final fast groove of the record gives the tone arm a final outward movement.-

The final outward movement of the time arm'10 moves the arm 12 which engages the outer finger 33-to move the controller 30 out,- warclly onthe body-14 and to rotate the arm 23 whereby itwill bringthe head 25 in a position where the projection. 13 will .passon the inner faceofthe head to furthercain the arm24 thus counter-clockwise pivoting 'the 'ar1n23 wherebythe projection 27 will strike the brake surface 39 and pivot the brake to i its braking position, all as shown in Inconsidering the structure and its operationv itwill be seen that the head'25 extends beyond the plane of. the arm 24. whereby after actuation the projection 13 is released to rotatewith the turntable. The device may thus be reset by therelease' of the brake and by the outward movei'nentof the tonearm, which movementreplaces the controller 30 by engagementof the arm. 12 with the inner finger 33. It will further be seen that the elongation of the apertures 31 and: 32 pro-,

vides for a substantial flexibility ofapertures as for instance-the final groove may oscillate the tone arm'without effecting the setting of'the arm 23;

In considering the invention it will [be understood that :the invention is not confined .to design of parts and structural details in volved and that numerous changes and modifications and the-full use or equivalents Pmay be resorted to without departing from. the

spirit or scope of the present-invention;

. 12's i v Having now described my invention, what i 1 I claim and. desire-to; secure by LettersPatinter-engaging means actuated jointly by said projections to move said brake, said means including a controller engagable at predetermined positions of the tone arm by the projection movable therewith and a brake contacting arm associated with said controller, and means carried by said controller to prevent accidental movement thereof. 7 r

3. An automatic phonograph stop including a brake, a projection on the turntable, a projection movable with the tone arm, an

inter-engaging means actuated jointly by said projections to move said brake, said means including a controller engagable at predetermined positions of the tone arm by the projection movable therewith and a brake contacting arm associated with said controller and movable to apply the brake by the turntable projection, and means carried by said controller to prevent accidental movement thereof.

4:. An automatic phonograph stop including a brake, a projection on the turntable, a projection movable with the tone arm, an

inter-engaging means actuated jointly by said projections to move said brake, said means including a controller enga'geable at predetermined positions of the tone arm by the projection movable therewith and a brake. contacting arm associated with said controller and movable to apply the brake by the turntable projection, said controller having lost motion connections to permit limited movement thereof without affecting said brake, and means carried by said controller to prevent accidental movement thereof.

5. A device of thecharacter described including a body, a braking element carried thereby, an actuator mounted to actuate said braking element and a controller for setting said actuator, said controller being arranged for movement by the tone arm and including means for locking the same against movement other than by said tone arm.

6. A device of the character described including a body, a braking element carried thereby, an actuator mounted to actuate said braking element and a controller for setting said actuator, said actuator being positionable for movement by the turntable, said controller being arranged for movement by the tone arm and including means for locking the same against movement other than by said tone arm.

7. A device of the character described including a body, a braking element carried thereby, an actuator mounted to actuate said braking element and a controller for setting said actuator, said actuator being positionable for movement by the turntable, said controller being arranged for movement by the tone arm, said actuator and controller having a connection whereby said controller sets the position of said actuator, said controller including means for locking the same against movement other than by said tone arm.

8. A device of the character described including a body, a braking element carried thereby, an actuator mounted to actuate said braking element and a controller for setting said actuator, said actuator being '1 positionable for movement by the turntable, said controller being arranged for movement by the tone arm, said actuator and controller having a connection whereby said controller sets the position of said actuator, said connection having lost motion, said controller including means for locking the same against movement other than by said tone arm.

9. A device of the character described, including a body, a brake element carried by said body, detents on said body for limiting the movement of said brake element, a brake actuator mounted on said body, a detent on said body to limit the movement of said actuator, a controller slidably mounted on said body in operative relation with said actuator, said actuator and controller being jointly operative by a turntable and tone arm respectively, and means carried by said controller to prevent movement thereof eX- June, 1929.

FRANK OBERST. 

